<template>
    <div>
		<!-- 图片分类区 -->
        <div id="slider" class="mui-slider">
				<div id="sliderSegmentedControl" class="mui-scroll-wrapper mui-slider-indicator mui-segmented-control mui-segmented-control-inverted">
					<div class="mui-scroll">
						<span :class="['mui-control-item',item.id===0 ? 'mui-active':'']" v-for="item in category" :key="item.id"
						@click="getPhotoByCategory(item.id)">
							{{item.title}}
						</span>
					
					</div>
				</div>

			</div>
    <ul class="lazyul">
		<router-link tag="li" v-for="item in photolist" :key="item.id" :to="'/home/photoinfo'+item.id">
			<!-- 注意：v-lazy要指定图片的地址 -->
			<img v-lazy="item.img_url">
        <div class="info">
			<h1 class="info-title">{{item.title}}</h1>
			<div class="info-content">{{item.zhaiyao}}</div>

		</div>
		</router-link>
	</ul>
    </div>
</template>

<script>
//导入mui的js文件，这样就可以使用mui来初始化滑动控件了
import mui from'../../../lib/mui/js/mui.js'


export default {
    data(){
        return{
			category:[],//所有的图片分类数据
		
			photolist:[]//图片列表
		};
    },
	created() {
		this.getPhotoCategory();
		this.getPhotoByCategory(0)
	},
    methods: {
       async getPhotoCategory() {
      // 获取图片的分类数据
      const { data } = await this.$http.get("/api/getimgcategory");
      if (data.status === 0) {
        // 手动补全分类的信息
        data.message.unshift({ title: "全部", id: 0 });
        this.category = data.message;
      }
    },
    async getPhotoByCategory(id) {
      // 根据图片分类的Id获取图片的数据
      const { data } = await this.$http.get("/api/getimages/" + id);
      if (data.status === 0) return (this.photolist = data.message);
    }

 
    }, 
    mounted(){
        //当此钩子函数执行的时候，我们才可以进行控件或插件的初始化工作
        mui('.mui-scroll-wrapper').scroll({
	deceleration: 0.0005 //flick 减速系数，系数越大，滚动速度越慢，滚动距离越小，默认值0.0006
});
    }
}
</script>

<style lang="scss" scoped>
.mui-slider {
  touch-action: pan-x;
}
.lazyul{
	
	margin: 0;
	padding: 10px;
	li{
		background-color: #ccc;
		text-align: center;
		box-shadow: 0 0 7px gray;
		position: relative;
		&+li{
			//这种样式的写法，适合场景：排除第一个，应用给其他所有的li
			margin-top: 10px;
		}
		margin-top:10px ;
		img{
			vertical-align: middle;
			width: 100%;
		}
	img[lazy="loading"]{
	width: 40px;
	height: 300px;
	margin: auto;
}
	}
}

.info{
	position: absolute;
	bottom: 0;
	color: #fff;
	background-color: rgba(0,0,0,0.5);
	max-height: 86px;
	overflow: hidden;
	.info-title{
		font-size: 14px;
	}
	.info-content{
		font-size: 13px;
		text-align: left;
		text-indent: 2em;
	}
}
</style>